Remove unused nll debug flags

2018-12-30T20:44:44+00:00

Remove licenses

2018-12-26T04:08:33+00:00

Workaround rust-lang/rust#49998 by opting into experimental `-Z nll-subminimal-causes` flag

2018-04-18T13:37:30+00:00

This commit only applies the flag to the one test case, ui/span/dropck_vec_cycle_checked.rs, that absolutely needs it. Without the flag, that test takes an unknown amount of time (greater than 1 minute) to compile. But its possible that other tests would also benefit from the flag, and we may want to make it the default (after evaluating its impact on other tests). In terms of its known impact on other tests, I have only evaluated the ui tests, and the *only* ui test I have found that the flag impacts (running under NLL mode, of course), is src/test/ui/nll/issue-31567.rs In particular: ``` % ./build/x86_64-unknown-linux-gnu/stage1/bin/rustc ../src/test/ui/nll/issue-31567.rs error[E0597]: `*v.0` does not live long enough --> ../src/test/ui/nll/issue-31567.rs:22:26 | 22 | let s_inner: &'a S = &*v.0; //~ ERROR `*v.0` does not live long enough | ^^^^^ borrowed value does not live long enough 23 | &s_inner.0 24 | } | - borrowed value only lives until here | note: borrowed value must be valid for the lifetime 'a as defined on the function body at 21:1... --> ../src/test/ui/nll/issue-31567.rs:21:1 | 21 | fn get_dangling<'a>(v: VecWrapper<'a>) -> &'a u32 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: aborting due to previous error For more information about this error, try `rustc --explain E0597`. % ./build/x86_64-unknown-linux-gnu/stage1/bin/rustc ../src/test/ui/nll/issue-31567.rs -Z nll-subminimal-causes error[E0597]: `*v.0` does not live long enough --> ../src/test/ui/nll/issue-31567.rs:22:26 | 22 | let s_inner: &'a S = &*v.0; //~ ERROR `*v.0` does not live long enough | ^^^^^ borrowed value does not live long enough 23 | &s_inner.0 24 | } | - | | | borrowed value only lives until here | borrow later used here, when `v` is dropped error: aborting due to previous error For more information about this error, try `rustc --explain E0597`. % ```

Point at var in short lived borrows

2017-12-15T06:45:45+00:00

Stabilize const-calling existing const-fns in std

2017-11-26T22:43:44+00:00

Fixes #46038

change #![feature(const_fn)] to specific gates

2017-09-16T15:53:02+00:00

improve "Doesn't live long enough" error

2016-10-20T19:51:51+00:00